That means I will need two separate power supply right? One for 24v and another 5v. But then if the input common is 24v, where does the +5v connect to?only inputs 000-007 can be switched to operate in 5V range. all others remain 24V only...
That means I will need two separate power supply right? One for 24v and another 5v. But then if the input common is 24v, where does the +5v connect to?only inputs 000-007 can be switched to operate in 5V range. all others remain 24V only...
Thanks but i don't really know how to use this 5V on the plc inputs 000-007. Would you help advise me? The problem with me is that all the inputs terminal share the same common "C1". So since the input common is tapped with +24V, so where should the +5v go to now?You can (but you don't have to) use this 5V to power other devices (if you had anything else running on 5V). If you want, you can use this 5V to drive inputs 000-007 of your PLC.
Hi Scott,I'm not sure how to change the voltage from 24V to 5V, maybe use dip swicth or software, I have no datasheet about the PLC.
It's more clear for all the input, good...i don't think you confirmed full part number of your PLC so it is still
unclear if you have PNP or NPN version.
for PNP connections you would do something like this:
Hi panic mode, thanks for diagram, that was very clear but On my post #10, I mentioned the part number which is kv-40dt. Thus it is a NPN version.since it is NPN, does the common connect to 24v. The diagram you shown will be totally different right?i don't think you confirmed full part number of your PLC so it is still
unclear if you have PNP or NPN version.
for PNP connections you would do something like this:
yes you did. and in post 13 i explained that there is good chance of more than one label and that full part number is usually not printed on front of the unit. but if that is full part number your unit is NPN, we can move on...Hi panic mode, thanks for diagram, that was very clear but On my post #10, I mentioned the part number which is kv-40dt.
I notice on your diagram, you put a 5V symbol.to get 5V to group of inputs 000-007 you should to wire them like this:
i will try but forgive me if i loose patience or interest as this is barely moving forward. for some strange reason you keep on trying to bring 24V power source to circuit configured to operate with 5V. i fail to see reason to this, in my mind it should be obvious that this is a bad idea.Please bear with me for a while.
I'm sorry for making you unhealthy due to my strange understanding. But let's stay cool buddy, please do forgive me as I am only at rookie level trying to understand as much as i can from guys like you who are the experts in plc or perhaps electronics. I'm glad that you have been great in sharing the knowledge to we people here.i will try but forgive me if i loose patience or interest as this is barely moving forward. for some strange reason you keep on trying to bring 24V power source to circuit configured to operate with 5V. i fail to see reason to this, in my mind it should be obvious that this is a bad idea.
I do understand the basic of closed loop circuit but perhaps its because i doesn't know how to phrase or draw my questions in a way understandable to you.also you don't seem to understand concept of closed circuit. i'd suggest to learn basics of DC circuit analysis, like open and closed circuit, voltage divider and biasing LED before moving any further but it is your call.
Yes, i understand that i can only use 24V input voltage only when I set to 24V on the dip switch,btw. circuit in post 35 is not ok because:
1. you use 24V as input voltage while text and image show switch in 5V position. this is wrong. revise your thinking/interpretation of function of that switch.
2. remaining inputs will simply not work because the circuit is not closed. the 24V that goes to switches wired to inputs 008, 009 etc is not connected to common terminal on the PLC (C1). in other words circuit is open regardless of state of the switches wired to those inputs. from PLC perspective, they are all off.
by Duane Benson
by Duane Benson